江苏近岸海域水环境质量状况及主要污染因子研究

采用主成分分析法对2004～2007年江苏近岸海域的水质污染进行了分析研究,从众多的污染因子中提取出水质污染的5个主要因子,并利用测点排序分析江苏省近岸海域水环境质量变化情况.研究结果表明:(1)5个主成分因子累计可解释总方差的76.55%,主成分F1因子中,无机氮(DIN)、硝酸盐氮(NO3--N)、锌(Zn)、化学需氧量(COD)、活性磷酸盐(PO43--P)有较高的载荷值,可认为是N污染因素、生活污水污染的综合;主成分F2因子中,汞(Hg)、石油类(OIL)有较高的载荷值,代表了石化废水污染;主成分F3中,铅(Pb)、铜(Cu)、镉(Cd)的载荷值较高,代表了海域的重金属Pb,Cu,Cd污染因素;主成分F4因子中,亚硝酸盐氮(NO2--N)、溶解氧(DO)的载荷值较高,代表了N污染因素;主成分F5因子中,仅pH值的载荷值较高,其实际意义不明显.(2)2004～2007年,江苏近岸海域水环境质量有所改善.

Study on Environmental Quality and Main Pollution Factors of Coastal Water in Jiangsu Province

By using PCA, the quality and influence factors of coastal water of Jiangsu Province were analyzed. The results showed that: (1) the 5 main factors cumulatively accounted for 76.55% of the total variance explained. During component matrix, DIN, NO3--N, Zn and COD had high value in F1, which may be considered as contamination from mix of N and living sewage; Hg and oil had high value in F2, which may be considered as contamination of petrochemical liquid waste; Pb, Cu and Cd had high value in F3, which may b...